William Williams Keen

William Williams Keen (19 January 1837-7 June 1932) was an important surgeon from the United States, being the first brain surgeon in the country and working with six presidents as their physician.

Biography
William Williams Keen was born on 19 January 1837 in Philadelphia, United States, and he graduated from Brown University in 1859 and Jefferson Medical College in 1862. Keen served in the American Civil War as a medic for the Union, and for two years he studied in Paris and Berlin. From 1875 to 1889 he was President of the Philadelphia School of Anatomy, and in 1888 he was the first person to be successful in removing a brain tumor, becoming the first brain surgeon in the United States. In 1893 he removed a cancerous jaw tumor from President Grover Cleveland and helped President Franklin D. Roosevelt in his struggle with polio. He diedin 1932 at the age of 95 in Philadelphia.